How many mm should brake pads be?
The friction material on a new brake pad is typically about 8-12 millimeters thick, and those that are ready for replacement are worn down to about 3 mm.
What is discard thickness on rotor?
The discard thickness of a rotor is the thickness at which the rotor should be replaced. The common understanding of the definition of discard thickness is that it is a heat-related dimension. It is generally understood that if a rotor is at or below discard thickness, it cannot dissipate the heat generated.
How much material is removed when machining rotors?
From this point, the general standard is to remove at least two millimeters a side. More may be required depending on what condition of rotor you are working with. After the cutting is done, you may want to take a second measurement to ensure that the rotor is still useable.
What is the difference between machine to and discard thickness?
The average difference between nominal and machine to thickness is .050″ to .060″. The typical difference between machine to and discard is .015″. The discard thickness of a rotor is the thickness at which the rotor should be replaced. The common understanding of the definition of discard thickness is that it is a heat-related dimension.
What is the thickness of a front brake discard?
Front Brakes: Rotor Thickness (new) 32.2 mm, 1.27 in Minimum Rotor Machining Thickness 31.7 mm, 1.25 in Rotor Discard Thickness (see note) 30.7 mm, 1.21 in
What’s the difference between machine to and discard rotors?
The typical difference between machine to and discard is .015″. The discard thickness of a rotor is the thickness at which the rotor should be replaced. The common understanding of the definition of discard thickness is that it is a heat-related dimension.
What should discard thickness be on rotors?
Discard thickness is the thinnest a rotor can wear to. If the brake pads wear to nothing the caliper piston won‘t fall out of the caliper housing. It has nothing to do with heat. See the image below. Many vehicles with a rotor at or below discard stop without any issues.
The average difference between nominal and machine to thickness is .050″ to .060″. The typical difference between machine to and discard is .015″. The discard thickness of a rotor is the thickness at which the rotor should be replaced. The common understanding of the definition of discard thickness is that it is a heat-related dimension.
Front Brakes: Rotor Thickness (new) 32.2 mm, 1.27 in Minimum Rotor Machining Thickness 31.7 mm, 1.25 in Rotor Discard Thickness (see note) 30.7 mm, 1.21 in
The typical difference between machine to and discard is .015″. The discard thickness of a rotor is the thickness at which the rotor should be replaced. The common understanding of the definition of discard thickness is that it is a heat-related dimension.
When to mark this dimension on brake drums?
The marking of this dimension on brake drums and rotors is in accordance with Massachusetts Law # 904 Acts of 1968. CAUTION: To insure product safety, it is critical that any brake drum or rotor reaching this dimension by turning, grinding and/or wearing be considered unsafe and immediately replaced.